BOMBARDIER Challenger 601-3A CL-600-2B16 Pilot Training Manual page 446

counter is graduated in increments of 1,000
feet to 50,000 feet. The altimeter pointer and
counter operate through mechanical linkages
connected to barometric capsules that expand
and contract with increases and decreases in
aircraft altitude.
Barometric settings are displayed by a four-
digit counter in inches of mercury (IN HG).
The barometric pressure set knob (BARO) on
the lower-left side of the instrument is used to
set the barometric pressure and correct the
altitude pointer and counter indication.
O
CLI
F
F
DI
Figure 16-31. Standby Altimeter and Horizon Indicator
16-34 CL 601-3A/R
CL-600-2B16 PILOT TRAINING MANUAL
MB
VE
TO
FOR TRAINING PURPOSES ONLY
FlightSafety Canada
Standby Horizon Indicator
The self-contained standby horizon indicator
provides visual pitch and roll aircraft attitude
information (Figure 16-31). The indicator
contains an electrically driven gyro. A me-
chanical erection system maintains the verti-
cal attitude. The indicator provides continued
attitude information for a minimum of nine
minutes after a loss of all electrical power.
With DC power available, 28 VDC for the
standby horizon indicator is supplied from
the LIGHTS PLT MAP circuit breaker on 28-
VDC BUS 2, CDP-B. If DC BUS 2 fails, a
0
9
0 0 0 0 0
8
7
ALT
IN HG
6
30
L t é e
L t d .
1
2
3
4
29